[clang] [CIR][HIP] Match kernel handle linkage, visibility and comdat (PR #227267)

[Arseniy Obolenskiy via cfe-commits]

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@@ -357,6 +357,13 @@ void CIRGenNVCUDARuntime::emitDeviceStub(CIRGenFunction &cgf, cir::FuncOp fn,
     globalOp->removeAttr("sym_visibility");
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aobolensk wrote:

```suggestion
```
`setSymbolVisibility` takes care of it

https://github.com/llvm/llvm-project/pull/227267